If you have not already done so, please read Blog Posts 1 through 5 that describe how sleep is important and beneficial. I will post specific information for parents and children based on my book, “Healthy Sleep Habits, Happy Child.” Please do not be put off by my book’s length. This is a reference book. Read only the topic of interest to you.
In Western medicine, the case for healthy sleep is built from randomized controlled trials, brain imaging studies, longitudinal cohorts, and epigenetic research. The argument is compelling, and it is relatively recent — most of the foundational research has accumulated over the past few decades.
In China, the argument was settled a long time ago. It was settled in a proverb.
吃人参不如睡五更
Chī rénshēn bùrú shuì wǔgēng.
“Eating ginseng is not as good as sleeping through the five watches.”
To a Western reader, this may sound like a pleasant folk saying. To understand its weight, you need to understand what ginseng means in Chinese culture — and what it has meant for thousands of years.
Ginseng is not simply an herbal supplement. In Traditional Chinese Medicine (TCM), it is the most revered substance in the entire pharmacopoeia. For millennia, it was believed to slow aging, strengthen the vital organs, prevent disease, restore energy, and extend life. Emperors sought it. Physicians prescribed it. Families spent fortunes acquiring it. It was, in the most literal sense, the most valuable medicine that money could buy.
And the proverb says: sleep is better.
Not comparable to ginseng. Not as effective as ginseng under certain conditions. Better. More restorative. More essential. No tonic, however precious, can replace what the body does for itself during a full, undisturbed night of sleep.
The Five Watches
The “five watches” — wǔ gēng — refers to the ancient Chinese division of the night into five periods, spanning from approximately 7pm to 5am. To sleep through the five watches meant to sleep the full night, uninterrupted, from the beginning of darkness to the early morning hours. It was understood as the complete sleep — the sleep that fully restored what the day had consumed.
The emphasis on uninterrupted sleep is not incidental. Consolidated sleep — sleep that runs its full course without fragmentation — is biologically different from fragmented sleep of the same total duration. The brain processes, repairs, and develops differently when sleep is continuous. The ancient Chinese did not have the vocabulary of slow-wave sleep, glymphatic clearance, or memory consolidation — but they had the observation. Full, undisturbed rest was the goal. Partial or interrupted sleep was insufficient.
Traditional Chinese Medicine and the Logic of Sleep
In Traditional Chinese Medicine, the foundational framework is the balance of Yin and Yang — opposing but complementary forces whose harmony underlies health. Sleep is understood as the body’s primary mechanism for restoring that balance. Wakefulness is Yang: active, outward, consuming. Sleep is Yin: restorative, inward, replenishing. A life spent depleting Yang without sufficient Yin restoration produces illness. The prescription is sleep.
TCM teaching holds that the hours between 11pm and 3am are particularly significant for the restoration of the liver and gallbladder — organs associated in TCM with the processing of emotions, the regulation of energy flow, and the detoxification of the body. Whether or not this maps precisely onto Western physiology, the underlying principle is consistent with what modern research confirms: the timing of sleep matters, not only its duration. Sleep that occurs at the wrong time — too late, misaligned with the body’s natural rhythms — does not provide the same restoration as sleep that begins when the body is ready for it.
The TCM hierarchy is explicit: food is a better cure than medicine, and sleep is better than food. This is not a metaphor. It is a clinical priority ordering, arrived at through thousands of years of observation: before you reach for the remedy, ask whether the person is sleeping. If they are not, the remedy is insufficient. Restore the sleep first.
What This Means for Western Parents
The proverb and the medical tradition behind it carry a message that translates directly into the language of modern pediatric sleep science.
Sleep is not a passive state. It is the body’s — and the brain’s — most active restorative process. No supplement, no intervention, no amount of enrichment activity substitutes for it. The child who is sleep-deprived cannot be compensated by vitamins, early learning programs, nutritious food, or loving attention during waking hours. The deficit is in the brain’s fundamental maintenance cycle, and only sleep closes it.
The ginseng proverb makes this point with an economy that decades of Western research have only recently begun to match. Ginseng — the most powerful medicine available — is not as good as a full night’s sleep. By extension: neither is anything else.
A healthy child needs a healthy brain. A healthy brain needs healthy sleep.
China knew this first. The science has caught up.
— Marc Weissbluth, M.D.
